122 RTBC- Image Evaluation and Quality
Control|Exam Questions with Complete Answers
How does decreased image contrast affect the structural sharpness of a radiograph?
Decreased visibility of structural sharpness
Which of the following images demonstrates the lowest spatial resolution?
Image (B)
The spatial resolution of a radiographic system is measured with units of:
Line-pairs per millimeter (lp/mm)
The following values were recorded on four different x-ray imaging systems. Which of
these values represents the highest level of structural sharpness?
20 line-pairs per millimeter (lp/mm)
The following values were recorded on four different x-ray imaging systems. Which of
these values represents the lowest level of structural sharpness?
11 line-pairs per millimeter (plan/mm)
Which two of these variables affect the spatial resolution recorded in the
radiographic image? (Select two)
- Source-to-image distance (SID)
- Object-to-image distance (OID)
Which of the following images demonstrates the highest spatial resolution?
,Image (D)
Which of the following anatomical parts can be an indicator of the spatial
resolution recorded in the radiographic image?
Trabecular bone
The four patient factors related to spatial resolution are object-to-image distance
(OID), patient size, pathology, and which of the following?
Patient movement
Increasing object-to-image distance (OID) will result in which of the following?
Decreased spatial resolution
Which object-to-image distance (OID) would result in the highest spatial resolution?
1 inch OID
Performing a thoracic spine in an anteroposterior (AP) projection instead of a
posteroanterior (PA) projection will have two of the following benefits? (Select two)
- Increased spatial resolution
- Decreased object-to-image distance (OID)
When performing an abdomen radiograph, which body habitus would result in
the largest object-to-image distance (OID)?
Hypersthenic body habitus (large patient)
Patient motion on a radiograph will have what type of appearance?
Blurring of anatomy
To prevent motion on a radiograph, technologists should: (Select two)
, - Provide clear instructions to the patient
- Decrease exposure time
Which of the following combinations of object-to-image distance (OID) and source-
to-image distance (SID) would produce the highest spatial resolution?
1 inch OID and 72 inches SID
A technologist working in the emergency room (ER) is attempting to take a
radiograph of the elbow of a trauma patient. Due to a fracture present, the
anatomical part is raised off the image receptor (IR) causing an increase in object-to-
image distance (OID). This scenario will result in which of the following?
Decreased spatial resolution
Performing a radiograph of the clavicle in the posteroanterior (PA) projection instead
of anteroposterior (AP) projection will increase spatial resolution because of which
of the following?
Decreased object-to-image distance (OID)
Which three of the following define beam geometry in radiographic imaging?
(Select three)
- Source-to-image distance (SID)
- Object-to-image distance (OID)
- Tube angulation
Which of the following angles are not considered part of beam geometry?
Rotor angle
Blurring at the edges of an object on a radiograph is referred to as:
Penumbra
Control|Exam Questions with Complete Answers
How does decreased image contrast affect the structural sharpness of a radiograph?
Decreased visibility of structural sharpness
Which of the following images demonstrates the lowest spatial resolution?
Image (B)
The spatial resolution of a radiographic system is measured with units of:
Line-pairs per millimeter (lp/mm)
The following values were recorded on four different x-ray imaging systems. Which of
these values represents the highest level of structural sharpness?
20 line-pairs per millimeter (lp/mm)
The following values were recorded on four different x-ray imaging systems. Which of
these values represents the lowest level of structural sharpness?
11 line-pairs per millimeter (plan/mm)
Which two of these variables affect the spatial resolution recorded in the
radiographic image? (Select two)
- Source-to-image distance (SID)
- Object-to-image distance (OID)
Which of the following images demonstrates the highest spatial resolution?
,Image (D)
Which of the following anatomical parts can be an indicator of the spatial
resolution recorded in the radiographic image?
Trabecular bone
The four patient factors related to spatial resolution are object-to-image distance
(OID), patient size, pathology, and which of the following?
Patient movement
Increasing object-to-image distance (OID) will result in which of the following?
Decreased spatial resolution
Which object-to-image distance (OID) would result in the highest spatial resolution?
1 inch OID
Performing a thoracic spine in an anteroposterior (AP) projection instead of a
posteroanterior (PA) projection will have two of the following benefits? (Select two)
- Increased spatial resolution
- Decreased object-to-image distance (OID)
When performing an abdomen radiograph, which body habitus would result in
the largest object-to-image distance (OID)?
Hypersthenic body habitus (large patient)
Patient motion on a radiograph will have what type of appearance?
Blurring of anatomy
To prevent motion on a radiograph, technologists should: (Select two)
, - Provide clear instructions to the patient
- Decrease exposure time
Which of the following combinations of object-to-image distance (OID) and source-
to-image distance (SID) would produce the highest spatial resolution?
1 inch OID and 72 inches SID
A technologist working in the emergency room (ER) is attempting to take a
radiograph of the elbow of a trauma patient. Due to a fracture present, the
anatomical part is raised off the image receptor (IR) causing an increase in object-to-
image distance (OID). This scenario will result in which of the following?
Decreased spatial resolution
Performing a radiograph of the clavicle in the posteroanterior (PA) projection instead
of anteroposterior (AP) projection will increase spatial resolution because of which
of the following?
Decreased object-to-image distance (OID)
Which three of the following define beam geometry in radiographic imaging?
(Select three)
- Source-to-image distance (SID)
- Object-to-image distance (OID)
- Tube angulation
Which of the following angles are not considered part of beam geometry?
Rotor angle
Blurring at the edges of an object on a radiograph is referred to as:
Penumbra
